Calk structure



April 10, 1934. D, w, WIGGlN 1,954,761

CALK STRUCTURE Filedmw.l 22, 1932 Zigi] 5' 4o and fatented Apr. 10, 19341,954,151 can: srnvc'runn Daniel W. Wiggin, Yarmouth, Maine, assigner toThe Abbott Company, Wilton, Maine, a corporation of Maine ApplicationNovember z2, 1932, serial No. 643,853

My present invention relates to calkk sole structures for shoes and likefootwear and to-a calk for such articles.

Calk soled shoes are used widely. For the impossible splitting of thetubular sole member below a desired point below 'the inside of the sole.As illustrative of my invention I have shown embodiments which indicatethe principles invvolved and at the-same time provide simple, effectiveand inexpensive structures and operations.'

In the drawing and specification, like reference numerals are used toindicate corresponding parts.

In the drawing:

Fig. I is a partly sectional view of a shoe structure such as isinvolved. i Fig. II is a sectional-view of the calk in place. i

Fig. III is a sectional View of the tubular sole member. y

Fig. IV is a'lside view Aof the calk to be used l therein.

Figs. V and VI'are face views of the interengagingcollar members.

Figs. VII and VIH are views of similar'calk members having radiallyflanged engagements,

Fig. IX is a sectional view of a calk in place showing a modified solemember.

In providing such a calked sole this inventionA contemplates a two partcalk member. One part '45 indicatedA as at 1 consists of a tubular solepiece.

This has a flange 2 at one end adapted to abut 4-the outer surface of asole` S, but said flange may be otherwise formed or omitted. In Fig. IX,the

tubular sole .piece is formed as a blind eyelet, the

end thereof 2", when-set, lying within the surface of the leather. Thetubular sole member thus formed. hasv some structural advantages. i

Internally as at 4.y the member '1 is threaded to receive the-calkshank. lAt the innerl end of the threaded area there is acllcumferentially located and maybe given any shape'or form desired'forded, but attened 'faces may be provided in shouldern to prevent thesplitting of the tubular sole piece below this point during thelvclinchingl and allowing for a maximuminternally threaded :receivingaperture 4 for the calk. -A't its inner 5 most part these shoes'are wornin such sports as end 3, the tubular sole piece 'is of less thickness 60than the threaded portion and may be tapered or llared as in Fig. III,so that the portion may be sprung or outwardly spread to clinch themember as is slfiown in Figs. I and II. The inner end of the tubularsole member may be scoredto facilitate clinching as at l`a in Fig. IX.'Ihe calk member consists of a point 10 having a threaded shank 1,1 anda iiange 12. The anges 2 and 12 will be interlocked when the calk andsole members are screwed up as 'shown' in Fig. II. 70

.The interlock may be variously effected as by projections 13 and recess5 .as in Figs. III to VI.

In Figs. V11 and VIII a modiiied formof calk is shown in which the ange16 Aof the sole member 15 has serrations 17. These engage with similarserrations 18 on the iiange 19 of the calk member 20. The flanges as inthe form previously described yield slightly on engagement permittinginterlocking of the -serrations.

The tubular sole members l may be set in the soles S as by a standardeyeletting machine. The calks may then be screwed thereinl until theilanges interengage. ISuch calks permit eflicient and practicalproduction with a very much fm'- proved sole structure resulting. Thesole member may be formed likea blind eyeletand so set. In such case thecalk ange supports the sole adf. jacent the eyelet set.

The calk points may be removed or substituted adding to the utility ofany shoe. The points may be pyramidal as indicated in Fig. IV or conical.as in Fig. VIII. The pyramidal form is convenient because a better gripfor a.- wrenchis afany form.

Variousl modications in the construction and` operations of my devicemay obviously be resorted to without departing trom the spirit of myinvention if within the limits of the appended claims;

What I therefore claim and desire to secure by Letters Patent iszy 1l Ina shoe structure, a sole and' calk assembly including a tubular insertcomprising a sleeve havingAv at its inner-end a reduced' portionlclinched tothe inner face ot the lsLole, a shoulder lfromwhich thereduced, portion extends, said sleeve being threaded 'internally towardthe shoulder, a flanged outer end, and a detachable calk with athreaded' shank engasing'said'sole 110 ltllY sibly reinforcing theinsert and adjacent sole structure and serving to hold the two membersin set position.-

2. A calk sole shoe structure comprising a member inserted through thesole, an outwardly directed iiange on the outer end thereof inengagement with the outer face of the sole, internally threaded toreceive a calk, a shoulder at the inner end of the threaded portion, theinner end of said member being outwardly tapered therefrom anddeiectively clinched against the inner surface of the sole.

3. A calk assembly for shoe soles comprisingv a tubular member to beinserted through a sole, a stop formation on said member for engagementwith the outer face o the soleto limit the insertion of the member, themember being of a length to extend at its inner end beyond the innerface of .the sole when the stop formation is engaged with the outer faceof the sole, the main member and having an external flange comprese. Ina shoe structure, a sole and a calk memv ber comprising a tubular inserthaving a ange at its outer end, said tubularinsert being ine teriorlythreaded in its outer end,`the inner portion being of less thicknessthan the threaded end, a shoulder intermediate said threaded end andsaid inne;` portion, and said inner portion being clinched to\f -theinner sole surface beyond said shoulder, and a call: threaded therein.

W. VV'IGGIN.

